John was piloting a plane behind a car but was never able to overtake it. Why?

What kind of tree can you carry in your hand?

Which alphabet letter is a question?

What goes up but never comes down?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

How can you leave a room with two legs and return with six legs?

Two natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.